I was looking at a 93 mercury Marquis at the JY. I couldn't get the disc off to get a measurement from flange to b/p. Anybody tried this swap? The Ford only uses 4 bolts to hold the back plate on vs Chryslers 5 bolts. But the bolt pattern looks the same as the 4 that are there. Drilling a 5th hole doesn't look like it would interfere with anything. It looks like it should fit my 8 1/4 which is out having a 3:91 put in it right now. Is the axle flange to back plate on the A body 8 3/4 the same as the 8 1/4? If it is then I can use the tech articles measurements and go back to the JY to see if it'll work. If this works it shouldn't cost more than about $75. for everything.